Across
- 3. - signaling molecules sent out by the endocrine system
- 4. - tissue that binds to and supports other tissues
- 6. - the widening of the diameter of blood vessels; promotes heat loss
- 10. - animal that allows its internal condition to change with external changes
- 12. - two proteins that enable muscles to contract
- 13. - different types of tissues organized into functional units
- 14. - the study of the biology functions an organism performs
- 17. - multiple tiers of cells
- 19. - the narrowing of the diameter of superficial blood vessels; reduces heat loss
- 20. - process by which animals maintain internal temperature within a normal range
- 23. - the transfer of heat by the movement of air or liquid past a surface
- 24. - a single layer of cells of varying length
- 26. - organisms use ___ to maintain a steady state or internal balance regardless of external environment
Down
- 1. - single cell layer
- 2. - involuntary and non-striated
- 5. - removal of heat from the surface of a liquid that loses some of its molecules as gas
- 7. - the transfer of heat between molecules of objects in contact with each other
- 8. - endocrine cells are grouped in ductless organs called endocrine ___
- 9. - animal that uses internal mechanisms to control internal change despite external fluctuation
- 11. - the emission of electromagnetic waves by all objects warmer than absolute zero
- 15. - involuntary and striated
- 16. - the study of the biological form of an organism
- 18. - animals gain heat from external sources
- 21. - animals generate heat by metabolism
- 22. - groups of cells with similar appearance and common function
- 25. - type of muscle that is voluntary and striated